Patents Assigned to Kemira
  • Treatment of animal litter with ferric sulfate granules
    Patent number: 8986666
    Abstract: Methods of treating animal litter and/or bedding material for control of volatile ammonia and soluble phosphorous include applying granular partially hydrated ferric sulfate to the litter. The partially hydrated ferric sulfate ranges from gray to tan in color and is spread onto the litter at a rate effective to reduce ammonia volatilization and reduce soluble phosphorous. Relative to reagent grade ferric sulfate, the partially hydrated ferric sulfate exhibits lower hygroscopicity and higher deliquescence. The ferric sulfate is prepared by a process comprising oxidizing ferrous sulfate with sulfuric acid using a molecular oxygen oxidizing agent at an elevated pressure relative to atmospheric and at a temperature of 60° C. to 140° C. to produce a gray to tan colored granular product.
    Type: Grant
    Filed: November 8, 2011
    Date of Patent: March 24, 2015
    Assignee: Kemira Water Solutions, Inc.
    Inventors: Jan J. Pavlicek, Victor Johnson
  • Tagged scale inhibitor compositions and methods of inhibiting scale
    Patent number: 8980123
    Abstract: Scale inhibitor compositions and methods of inhibiting scale formation generally include a tagged scale inhibiting (co)polymer including at least one scale inhibiting moiety and an imidazole moiety. The imidazole moiety fluoresces at a wavelength of about 424 nm and can be used to detect the amount of scale inhibitor present.
    Type: Grant
    Filed: April 22, 2013
    Date of Patent: March 17, 2015
    Assignee: Kemira Chemicals Inc.
    Inventors: Lucas Moore, Laura Clapp
  • Composition and process for increasing the dry strength of a paper product
    Patent number: 8980056
    Abstract: A dry strength additive composition generally includes an anionic and/or amphoteric polyacrylamide having a molecular weight of less than 1,000,000 Daltons, wherein the amphoteric polyacrylamide has a net negative charge; a cationic and/or amphoteric starch; and a cationic non-starch polymer having a charge density greater than 1 milliequivalent per gram (meq/g) at a pH of 3. The components defining the composition can be added to a pulp suspension sequentially or as a pre-blended mixture.
    Type: Grant
    Filed: November 15, 2010
    Date of Patent: March 17, 2015
    Assignee: Kemira Oyj
    Inventors: Chen Lu, Vladimir Grigoriev, Scott Rosencrance
  • Fixative composition, thick stock composition and process for fixating hydrophobic and/or anionic substances on fibres
    Patent number: 8936698
    Abstract: The present invention relates to a fixative composition and process for reducing hydrophobic and/or anionic substances in fiber-containing stock for making of paper, board or the like. The composition comprises a synthetic cationic polymer, which has a charge density of 3.0-24 meq/g, and a cationic non-degraded starch, which has charge density of 0.5-3.0 meq/g. The invention relates also to thick stock composition comprising fibers and a fixative composition according to the invention.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: January 20, 2015
    Assignee: Kemira, Oyj
    Inventors: Asko Karppi, Lenita Lindberg, Matti Hietaniemi
  • METHOD FOR PRODUCING PAPER, BOARD OR THE LIKE AND AGGLOMERATE
    Publication number: 20140360691
    Abstract: The invention relates to a method for producing paper, board or the like. In the method is obtained an aqueous filler dispersion, comprising particles of at least one first filler, the filler dispersion having a floc size distribution with original mean chord length value. The particles of the first mineral filler are brought into a contact with a cationic pre-treatment agent, which is capable of initiating flocculation of the filler particles in the dispersion, whereby a pre-treated filler dispersion comprising flocs, which comprise first mineral particles, is formed. The pre-treated filler dispersion is combined ed with a stock of fibres. The floc size distribution of the filler dispersion is changed with the pre-treatment agent, which is a natural and/or synthetic polymer, so that the mean chord length value increases at least with 2% from the original mean chord length value.
    Type: Application
    Filed: January 16, 2013
    Publication date: December 11, 2014
    Applicant: KEMIRA OYJ
    Inventors: Matti Hietaniemi, Mikko Virtanen, Jonni Ahlgren
  • Method and device for monitoring and controlling the state of a process stream
    Publication number: 20140343872
    Abstract: The present invention concerns a method of estimating and optionally controlling the microbiological state in a process stream of an industrial process by measuring the concentration of dissolved oxygen or the rH value, or both, in said stream, the method including continuous or periodic sampling and online measurement. The invention also concerns a device suitable for use in implementing said method.
    Type: Application
    Filed: November 30, 2012
    Publication date: November 20, 2014
    Applicant: Kemira Oyj
    Inventors: Pekka Ilmola, Kaj Jansson, Iiris Joensuu, Marjatta Piironen
  • Anionic dispersion polymerization process
    Patent number: 8877864
    Abstract: The invention provides an anionic dispersion polymerization process, wherein the polymerization is improved by an organic isothiocyanate, such as methyl isothiocyanate.
    Type: Grant
    Filed: October 14, 2011
    Date of Patent: November 4, 2014
    Assignee: Kemira Oyj
    Inventors: Rosa Carceller, Ari Juppo
  • Biocidal Systems and Methods of Use
    Publication number: 20140303045
    Abstract: Systems and methods for controlling microbial growth and/or activity in a gas field fluid or oil field fluid are provided, comprising: a) adding a first biocide component to the gas field fluid or oil field fluid in an amount effective to control microbial growth and/or activity; and b) after a delay, adding a second biocide component to the gas field fluid or oil field fluid.
    Type: Application
    Filed: April 4, 2014
    Publication date: October 9, 2014
    Applicant: Kemira Oyj
    Inventors: Scott Campbell, Angela Marie Johnson
  • DEVICE AND METHOD FOR CHARACTERIZING SOLID MATTER PRESENT IN LIQUIDS
    Publication number: 20140293040
    Abstract: The present invention relates to a device, system and method to measure tackiness of a substance, such as pulp, with an on-line or an in-line sensor having a transparent plate with a surface where tacky particles can attach. Attached particles are identified by a camera behind the plate. The camera is focused to detect stationary particles attached to the surface. Measurement is performed directly from a process stream or from a sidesteam and the plate does not need to be removed from the process for the measurement. The plate material may be plastic, such as polycarbonate or acrylic. Additionally, the flow speed may be kept be low, e.g. <0.1 m/s at the measurement position, and/or there may be a stagnation point of flow at or near measurement where the flow speed approaches zero.
    Type: Application
    Filed: September 3, 2012
    Publication date: October 2, 2014
    Applicant: KEMIRA OYJ
    Inventor: Matti Hietaniemi
  • Process for the preparation of peroxy acids
    Patent number: 8828910
    Abstract: The present invention relates to a process for the preparation of a solution comprising a first peroxy acid comprising performic acid and a second peroxy acid, said process comprising forming a carboxylic acid solution comprising a first carboxylic acid comprising formic acid, a second carboxylic acid and hydrogen peroxide, wherein the amount of formic acid is from 0.5 to 20% by weight of the amount of the second carboxylic acid, and allowing the components to react to form a solution comprising performic acid and said second peroxy acid, the amount of peroxy acids being at least 5% by weight. The invention also relates to a storable solution comprising performic acid and said second peroxy acid. The solution can be used as a disinfecting agent for controlling micro-organisms.
    Type: Grant
    Filed: September 13, 2006
    Date of Patent: September 9, 2014
    Assignee: Kemira Oyj
    Inventors: Reijo Aksela, Ilkka Renvall
  • Process for production of paper
    Patent number: 8784611
    Abstract: The invention relates to a process for the production of paper or board comprising: adding a retention system to a stream of stock entering a paper machine head box, directing the stream of stock to a wire, de watering the stream of stock on the wire to form a paper web, and drying the paper web, wherein the retention system comprises a water-soluble cationic polymer, and nanocellulose acting like a micro particle, wherein the nanocellulose is added in an amount of less than 1% as active substance based on dry solids weight of the stock.
    Type: Grant
    Filed: November 3, 2010
    Date of Patent: July 22, 2014
    Assignee: Kemira OYJ
    Inventors: Ari Juppo, Ulf Stenbacka
  • Method for improving rheological properties of an aqueous pigment slurry and a dispersion agent
    Patent number: 8785550
    Abstract: The invention relates to a method for improving rheological properties of an aqueous pigment slurry. In the method dispersion agent is added to an aqueous phase of a slurry comprising pigment particles or to the aqueous phase into which the pigment particles are to be added. The dispersion agent comprises styrene acrylate copolymer. The invention also relates to a dispersion agent for a pigment slurry comprising a first component comprising styrene acrylate copolymer and a second component comprising a conventional dispersion agent, such as a straight-chain polyacrylate.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: July 22, 2014
    Assignee: Kemira Oyj
    Inventors: Esko Aarni, Perttu Heiska, Kimmo Huhtala
  • Polyamine polyamidoamine epihaloohydrin compositions and processes for preparing and using the same
    Patent number: 8742030
    Abstract: Compositions of and processes for preparing a polyamine-polyamidoamine-epihalohydrin resin generally include reacting a first polyamine, a polyamidoamine, and an epihalohydrin to form the polyamine-polyamidoamine-epihalohydrin (PPAE) resin, wherein the polyamidoamine is prepared by reacting a polycarboxylic acid or a polycarboxylic acid derivative with a second polyamine to form the polyamidoamine, wherein a molar ratio of the polyamine to the polycarboxylic acid is 1.05 to 2.0. The PPAE resin can be used in an adhesive formulation for use in creping applications for forming paper products such as tissue products.
    Type: Grant
    Filed: March 4, 2013
    Date of Patent: June 3, 2014
    Assignee: Kemira Oyj
    Inventors: Chen Lu, Vladimir Grigoriev, Danny Nguyen, Scott Rosencrance
  • Azo dyes
    Patent number: 8734534
    Abstract: The present invention relates to new azo dyes, a process for their preparation, and their use for dyeing or printing fibrous materials, to produce materials with brownish shades.
    Type: Grant
    Filed: November 29, 2011
    Date of Patent: May 27, 2014
    Assignee: Kemira Oyj
    Inventors: Helmut-Martin Meier, Christof Heide, Klaus-Günter Strumpf, Thomas Hübbe
  • Azo dyes
    Patent number: 8734532
    Abstract: The present invention relates to new azo dyes, a process for their preparation, and their use for dyeing or printing fibrous materials, to produce materials with brownish shades.
    Type: Grant
    Filed: November 29, 2011
    Date of Patent: May 27, 2014
    Assignee: Kemira Oyj
    Inventors: Helmut-Martin Meier, Christof Heide, Klaus-Günter Strumpf, Thomas Hübbe
  • Polymeric compositions and their production and uses
    Patent number: 8697790
    Abstract: A composition includes a dispersion, having an aqueous phase containing a dissolved water soluble cationic coagulant polymer and if needed a dissolved inorganic salt. The aqueous phase further contains a dispersed water soluble flocculant polymer, wherein the water soluble flocculant polymer is formed of a water soluble ethylenically unsaturated monomer or monomer blend which are polymerized in the aqueous phase. The water soluble cationic coagulant polymer is cationic poly(alkyleneamine), which is the reaction product of the following reaction: H2N—(CH2)m—NR—(CH2)m—NH2+Cl—CH2CH2—Cl, wherein R is selected from the group consisting alkyl radicals containing from 1 to 4 carbon atoms m is an integer of from 1 to 4. The amount of dissolved inorganic salt is less than 10% by weight of the composition, and the composition is in a stable, pourable, dispersion form.
    Type: Grant
    Filed: August 8, 2012
    Date of Patent: April 15, 2014
    Assignee: Kemira Oyj
    Inventors: Marco Polverari, Anneli Lepo, Michael O'Toole
  • Defoaming Compositions
    Publication number: 20140090845
    Abstract: Cement compositions and processes for reducing air entrainment in a cement composition generally include mixing a hydraulic cement with a defoamer compositions including one or more organic acid ester polymers selected from an organic acid ester of polyethylene oxide polymer, an organic acid ester of polypropylene oxide polymer, and a mixture thereof. The compositions may further comprise an organic acid ester of an ethylene oxide-propylene oxide block copolymer.
    Type: Application
    Filed: September 28, 2012
    Publication date: April 3, 2014
    Applicant: KEMIRA OYJ
    Inventors: Amir H. Mahmoudkhani, Bava Luciana, Robert E. Wilson
  • Environmentally friendly tanning composition
    Patent number: 8685111
    Abstract: An embodiment of the present disclosure relates to a composition suitable for leather tanning comprising zeolite treated with monocarboxylic acid and to a method for manufacturing said composition. An embodiment of the present disclosure method comprises providing zeolite into a reactor and keeping said zeolite in motion while introducing concentrated monocarboxylic acid thereto provided that the mean temperature of the resulting composition is 50° C. or below.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: April 1, 2014
    Assignee: Kemira Oyj
    Inventors: Cuneyit Bagiran, Dominicus Brendler, Frank Wegener
  • Degrading agent compositions for temporary wet strength systems in tissue products
    Patent number: 8673117
    Abstract: A degrading agent composition for use in manufacturing a tissue product generally includes a degrading agent, a degradation inhibiting carrier, and a non-ionic surfactant. The non-ionic surfactant stabilizes the viscosity of the composition as a function of time. The degrading agent composition can be used in combination with a temporary wet strength agent to produce a tissue product exhibiting high initial wet tensile strength and desirable decay properties. Processes for forming the tissue product and pumpable fluids containing the degrading agent composition are also disclosed.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: March 18, 2014
    Assignee: Kemira Oyj
    Inventors: Scott Rosencrance, Yuping Luo, Vladimir Grigoriev
  • Deinking process
    Patent number: 8617353
    Abstract: The present invention provides a process for deinking printed waste paper comprising the steps of: a) converting the printed waste paper to an aqueous pulp slurry in a pulper, where ink is detached from paper pulp; b) subjecting the pulp slurry to flotation in order to remove hydrophobic contaminants including ink from the pulp slurry, said flotation being carried out in the presence of a deinking chemical additive comprising modified silica obtained by treating hydrophilic silica particles with a hydrophobic organic liquid or modified metal silicate obtained by treating hydrophilic metal silicate particles with a hydrophobic organic liquid or a mixture of such modified silica and modified metal silicate. The present invention increases the yield of the flotation step without affecting the brightness of the flotation accept.
    Type: Grant
    Filed: June 17, 2009
    Date of Patent: December 31, 2013
    Assignee: Kemira Oyj
    Inventors: Jean-Francois D'Allest, Tiina Sarja, Scott Rosencrance